Vertical Ladder Fall Cable Assembly for Easier Installation
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Solution Overview
Problem
Existing fall protection systems for vertical ladders are difficult to install and maintain in compliance with safety operational requirements.
Innovation Solution
A fall protection system comprising a top bracket assembly, a bottom bracket assembly, and a cable extending between them, which can be easily mounted to a vertical ladder using U-shaped coupling devices and Belleville washers to achieve desired tension, with a cable guide to stabilize the cable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional fall protection system with cable is installed on a vertical ladder, then fall protection function is provided, but installation difficulty and maintenance complexity increase
Solution Approach 1:
The fall protection system is divided into separate modular components: a cable assembly with tensioning mechanism, bracket assemblies for mounting, and a cable guide. This segmentation allows each component to be independently installed, adjusted, and maintained, significantly reducing installation difficulty and maintenance complexity while maintaining the fall protection function.
2Reliability
If cable tension is increased to improve fall protection reliability, then safety performance improves, but vertical loading on the ladder increases
Solution Approach 1:
The system employs a counterbalancing mechanism where the cable tensioning device creates opposing forces that neutralize vertical loading on the ladder. The cable is tensioned between upper and lower bracket assemblies, creating a pre-tensioned system where the vertical components of cable force counterbalance each other, allowing high cable tension for safety without proportionally increasing vertical load on the ladder structure.
3Area of stationary object
If the cable is positioned closer to the ladder for compactness, then space utilization improves, but cable stability and fall protection effectiveness decrease
Solution Approach 1:
A cable guide acts as an intermediary component between the ladder and the cable. This guide maintains the cable at an optimized distance from the ladder, providing lateral support and stability to prevent cable sway or disengagement during fall events, while still achieving compact overall system dimensions. The cable guide ensures proper cable positioning without requiring the cable to be immediately adjacent to the ladder.
Data Source
AI summary
A fall protection system having a top bracket assembly that is mountable to a top portion of the ladder, a spaced bottom bracket assembly that is mountable to a bottom portion of the ladder, and a cable extending therebetween portions of the top bracket assembly and the bottom bracket assembly substantially parallel to a plane bisecting the vertical ladder at a desired distance from the plane.